{"id":4936,"date":"2014-04-18T11:11:30","date_gmt":"2014-04-18T16:11:30","guid":{"rendered":"httpss:\/\/www.powenko.com\/wordpress\/?p=4936"},"modified":"2014-04-18T11:11:30","modified_gmt":"2014-04-18T16:11:30","slug":"03-copy_from_user-%e5%af%ab%e5%85%a5%e8%a8%98%e6%86%b6%e9%ab%94","status":"publish","type":"post","link":"https:\/\/www.powenko.com\/wordpress\/?p=4936","title":{"rendered":"03. copy_from_user \u5beb\u5165\u8a18\u61b6\u9ad4"},"content":{"rendered":"<p>char *memory_buffer;<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\nssize_t memory_write( struct file *filp, char *buf,\r\n                      size_t count, loff_t *f_pos) {\r\n\r\n  char *tmp;\r\n if(memory_buffer==null){\r\n      memory_buffer = kmalloc(1, GFP_KERNEL);\r\n  }else{\r\n    tmp=buf+count-1;\r\n    copy_from_user(memory_buffer,tmp,1);\r\n  }\r\n  return 1;\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>char *memory_buffer; ssize_t memory_write( struct file  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[202],"tags":[],"class_list":["post-4936","post","type-post","status-publish","format-standard","hentry","category-ch03-"],"_links":{"self":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4936"}],"collection":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4936"}],"version-history":[{"count":1,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4936\/revisions"}],"predecessor-version":[{"id":4937,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/4936\/revisions\/4937"}],"wp:attachment":[{"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4936"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4936"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.powenko.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4936"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}